Upper arch for boilers



J 6, 1925. 1,521,839 C E SHARP v UPPER ARCH FOR BOILERS Filed Jan. 5, 1923 S'Sheets-Sheet 1 C. E. SHARP UPPER ARCH FOR BOILERS Filed Jan. 5, 1925 3 Sheets-Sheet 2 Jan. 6. 1925. 1,521,839-

6:. E. SHARP UPPERARCH FOR BOILERS Filed Jan. 1923 3 Sheds-Sheet 5 Patented Jan. 6, 1925."

UNITED STATES A 1,521,839 PATENT OFFICE.

CHARLES E. SHARP, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR T'O LIPTAK TIRE- BRICK ARCH (30., A CORPORATION OF'MINNESOT'A.

UPPER ARCH FOR BOILERS.

Application filed January 5, 1923. Serial No. 610,811.

To all whom it may concern:

Be it known that 1, CHARLES E. SHARP, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in 'Upper Arches for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to fire arches for boilers and is particularly directed to the improvement of the upper arches of boilers, such as the Bigelow Hornsby boilers, which have inclined'drums and wherein the upper arches'fill in the spaces between the lower ends of the boiler drums and the tops of the furnace side walls. 1

In the construction of arches for the application above indicated, it is necessary that the blocks closely fill in the diverging spaces between the drums and, in the customary arrangement, it has been the practice to support these blocks by specially constructed and arranged supports in addition to'and distinct from the block-supporting beams, for the reason that the main beams have hitherto been terminated remote from the points of application of the blocks used to fill in such diverging spaces. The old type of block support has been not only expensive but unsatisfactory for many reasons. In the first place, they have not aflorded sufficient means for properly supporting the blocks used to fill in the diverging spaces between drums and, in the second place, it

has not been an easy matter to assemble or replace such blocks.

My invention radically improves the construction of arches-used for the above purpose or'for-the above notedapplication and it provides a construction in which all of the blocks of the arch are supported from the arch beams properf This is made not only possible but thoroughly practicable by spacing the arch beams so that certain thereof align with the space between drums, and by extending such beams in the common oblique plane with the other or shorter arch beams and extending thesame well into the diverging spaces between the drums. This arrangement makes it an easy matter to sup port or suspend, on the extended ends of such long beams, those blocks that are used to fill in drums.

A commercial embodiment of my invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a fragmentary view chiefly in transverse vertical section, showing the improved arch applied as above indicated;

Fig. 2is an oblique section taken approximately on the line 22 of Fig. 1;

Fig. 3 is a section taken approximately on the line 33 of Fig. 2;

Fig. 3 is a View corresponding to Fig. 3, but illustrating a modified form of block hanger;

Flg. 4 is a perspective showing one of the blockhangers employed in Figs. 1, 2 and 3;

Fig. 5 is a perspective showing one of the arch beams;

Fig. 6 is a perspective showing one of the main arch blocks;

the diverging spaces between Fig. 7 is a perspective showing one of the end blocks used on the long beams to fill in space between converging portions of adjacent drums; and

Fig. 8 is a perspective showing one of the end blocks used on short beams and adapted to quite closely fit the adjacent drum.

The inclined boiler drums 9 are of the customary arrangement and have the usual tubes 10. The numeral 11 indicates one of the furnace walls, the upper portion of which is spaced from the lower portions of the drums 9. q I

The space between the top of the wall 11 and the lower portions of the drums 9 is spanned and closed by my improved upper arch. To support thls upper arch, the customary transverse eye-beams 12 and 13 are employed and these are supported by the furnace walls or masonry work inthe usual way and are preferably connected by an I oblique tie-bar 14.

The arohbeams 15 are preferably cast structures set obliquely and formed on their lower edges with flanges 16, from which latter the arch blocks are adapted to be supported. To support these beams-15 from the transverse beams 12 and 13, said beams 15 are formed at their lower and upper ends, respectively, with approximately horizontal lower and upper outstanding flanges 17 and 18, and on these flanges are slidable beam or longitudinally of said beams.

Certain of the beams 15 are made longer than others and the long beams are aligned with the spaces between the drums 9 and are extended into the diverging spaces between the drums so that they will effectually support those blocks that are used to fill in such diverging spaces. In the preferred arrangement, the long and short beams are alternated andthe short beams are aligned with the longitudinal centers of the drums. This arrangement gives the proper spacing for supporting arch blocks of practicable and desirable size, to wit: blocks of about 14 inches in width. A suitable form of block for forming the main body of the arch is shown in detail in Fig. 6 and. in this view and other views, is indicated by the numeral 20. For detachably hanging the blocks 20 from the flanges 16 of the cooperating beams' 15, block hangers of various different designs may be employed. Fig. 4 illustrates in detail a suitable hanger for the above purpose and which hanger consists of an approximately C-shaped casting 21 having outwardly extended cars 22. The blocks 20, in the above indicated arrangement, are formed in their tops with central channels 23 havin undercut shoulders 24. When the inturned ears of the hangers 21 are slid onto the flanges 16 of the beams 15 and their outstanding ears 22 are engaged under the shoulders 24, the blocks 20 will be securely held in position, but they may be readily disconnected by sliding the hangers so that their cars 22 will be out from under the shoulders 24:. To limit the downward movement of the lowermost blocks 20, the beams 15 are provided with depending stop flanges 25.

For application to the upper ends of the long beams, to fill in the diverging spaces between the drums 9, I provide end blocks 26 having converging surfaces 27 formed approximately on the same curved lines as the drums. These blocks 26 may be .supported from the beams 15 by the block hangers shown in Fig. 4, but when so supported, several hangers will preferably be used for 'each block, because these blocks 26 are much larger and heavier than the blocks 20. To adapt said blocks 26 to be thus suspended, they are formed with vertical entrance pockets 28 and with undercut shoulders 29. The hangers'are adapted to be moved into the blocks through the entrance pockets 28 and their outstanding ears 22 may then be engaged under the shoulders 29.

For application to the ends of the short out displacing an adjacent block.

a commercially 1,521 ,aae

beams, I provide end blocks 30, the outer faces of which are curved at 31 approximately on the same line as the drums, and to adapt these blocks to be hung by the hangers above described, they are formed with undercut shoulders 32, with which the outstanding cars 22 of said hangers are adapted to be engaged.

liy the use of hangers of the character above described, it is made possible to remove any one of the blocks of the arch withhe curved surfaces 27 of the blocks 26 and the curved surfaces 31 of the blocks 30 are preferably spaced from the drums about onehalf of an inch and this space is filled in with a fire-proof substance, such as asbestos packing, indicated at 33.

The hangers illustrated in Fig. 3* comprise approximately C-shaped heads 3% and depending T-shaped stems 35, the former of which are slidable on the beam flanges 16 and the latter of which are engageable with the undercut shoulders of the blocks.

What I claim is:

1. In a boiler installation, the combination with laterally spaced drums, of an associated arch extended in a plane that transversely intersects the axes of said drums and comprising a plurality of relatively long and short beams, the long beams being extended into diverging spaces between drums, and arch-forming blocks hung from said beams, the blocks on the ends of the long beams filling the diverging spaces between drums.

2. In a boiler installation, the combination with laterally spaced drums, of an associated arch extended in a plane that transversely intersects the axes of said drums and comprising a plurality of relatively long and short beams, the long beams being extended into diverging spaces between drums, and arch-forming blocks hung from said beams, the blocks on the ends of the long beams filling the diverging spaces between drums, the relatively short beams being terminated short of outwardly bulging portions of the drums and the blocks on the ends of said long and short beams having curved surfaces that approximately follow the adjacent surfaces of the drums.

8. In a boiler installation, the combination with laterally spaced obliquely set drums, of an associated arch extended in an oblique plane that transversely intersects the axes of said drums comprising a plurality of relatively long' and short beams,

the long beams being extended into diverging spaces between drums, and arch-forming blocks hung from said beams, the blocks on the ends of the long beams 'filling the diverging spaces between drums, said long and short beams being in a common oblique plane.

i. In a boiler installation, the combination E89 with laterally spaced obliquely set drums, of an associated arch extended in an oblique plane that transversely intersects the axes of said drums comprising a plurality of relatively long and short beams, the lon beams being extended into diverging spaces etween drums and arch-forming blocks hung from said beams, the blocks on the ends of the long beams filling the diverging spaces between drums, the relatively short beams bein terminated short of outwardly bulging portionsof the drums and the blocks on the ends of said long and short beams having curved surfaces that approximately follow the adjacent surfaces of the drums, said long and short beams being in a common oblique plane.

5. In a boiler installation, the combination with laterally spaced obliquely set drums, of an associated arch extended in an oblique plane that transversely intersects the axes of said drums comprising a plurality of relatively long and short beams, the long beams being extended into diverging spacesbetween drums, and arch-forming blocks hung from said beams, the blocks on the ends of the long beams filling the diverging spaces between drums, the blocks on said long and short beams being independently hung and independently removable from and replaceable on cooperating beams.

In testimony whereof I aflix my signature.

amiss. SHARP. 

